Creating The Best Fudgy Chewy Brookies is straightforward when you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking pan.

2. Prepare the Brownie Layer:
a. In a large saucepan, melt the butter over medium heat.
b. Stir in the sugar, and mix until combined.
c. Remove from heat. Allow it to cool slightly.
d. Beat in the eggs, one by one, and add vanilla extract.
e. Stir in the flour, cocoa powder, and salt until well combined.
f. Mix in chocolate chips (if using) and set aside.

3. Prepare the Cookie Layer:
a. In a mixing bowl, cream together softened butter, granulated sugar, and brown sugar until fluffy.
b. Beat in eggs, one at a time, then add the vanilla extract.
c. In a separate bowl, whisk together flour, baking soda, and salt.
d. Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
e. Stir in the chocolate chips.

4. Layer the Batters:
a. Pour the brownie batter into the bottom of the greased baking pan, spreading it evenly.
b. Carefully place spoonfuls of the cookie dough over the brownie layer. Use a spatula or your hands to flatten it slightly and cover the brownie layer.

5. Bake: Place the pan in the preheated oven and bake for 25-30 minutes. The edges should be set, and a toothpick inserted in the center should come out with some moist crumbs.

6. Cool: Remove from the oven and let the brookies cool in the pan for about 10 minutes. This helps them set before slicing.

7. Slice and Serve: Cut into squares or rectangles, as preferred.

These steps will guide you in crafting the best fudgy, chewy brookies, filling your kitchen with sweet aromas and your heart with joy.